KR100536041B1 - Lapping, Polishing machine - Google Patents

Lapping, Polishing machine Download PDF

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Publication number
KR100536041B1
KR100536041B1 KR10-2004-0024975A KR20040024975A KR100536041B1 KR 100536041 B1 KR100536041 B1 KR 100536041B1 KR 20040024975 A KR20040024975 A KR 20040024975A KR 100536041 B1 KR100536041 B1 KR 100536041B1
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KR
South Korea
Prior art keywords
swing arm
polishing
gear
workpiece
block
Prior art date
Application number
KR10-2004-0024975A
Other languages
Korean (ko)
Other versions
KR20050099781A (en
Inventor
김옥현
오창진
Original Assignee
충북대학교 산학협력단
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 충북대학교 산학협력단 filed Critical 충북대학교 산학협력단
Priority to KR10-2004-0024975A priority Critical patent/KR100536041B1/en
Publication of KR20050099781A publication Critical patent/KR20050099781A/en
Application granted granted Critical
Publication of KR100536041B1 publication Critical patent/KR100536041B1/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/48Treatment of water, waste water, or sewage with magnetic or electric fields
    • C02F1/481Treatment of water, waste water, or sewage with magnetic or electric fields using permanent magnets
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00Apparatus for treatment of water, waste water or sewage
    • C02F2201/002Construction details of the apparatus
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00Apparatus for treatment of water, waste water or sewage
    • C02F2201/48Devices for applying magnetic or electric fields

Abstract

A polishing apparatus is disclosed. The grinding mill according to the present invention includes a workpiece transfer unit having a fixed plate disposed fixedly on one side of an upper surface of the base plate and a transfer plate disposed to be transportable along the fixed plate; A workpiece clamping portion having a conventional index driver fixed on an upper surface of the conveying plate; Tilt angle adjusting part having a base facing each other from the other side of the upper side of the base plate, a rotating shaft rotatably disposed between the bases, and an adjusting frame having a lower portion mounted on the rotating shaft and pivoting and having a vertical receiving groove in the center portion thereof. ; Swing arm drive motor is arranged in the receiving groove, the swing arm driving motor, the lower part is connected to the swing arm driving motor, the upper part is rotatably mounted on the upper surface of the receiving groove, and is mounted while wrapping the swing arm rotating shaft and swing arm rotating shaft Polishing control unit having a height adjusting block which is moved up and down and rotated in the forward and reverse directions along the; And a swing arm mounted on the other end of the height adjustment block so as to be pivotable up and down and one end extending toward the rotary table, and a disk-shaped polishing facing the workpiece mounted on the upper end of the swing arm. The tool post and the cylinder rod extending from one end to the other end of which is mounted up and down on one side of the height adjustment block are composed of a polishing part having a pneumatic cylinder mounted on the upper portion of the swing arm.

Description

Polishing Machine {Lapping, Polishing machine}

The present invention relates to an improved abrasive machining apparatus for processing curved surfaces of optical components, and more particularly, to coincide with the center of rotation of the tool toward the center of curvature of the workpiece so that the rotational trajectory of the tool is moved along the curved surface of the workpiece, The present invention relates to an apparatus for polishing which can maintain a constant machining pressure in all areas of a curved surface in a direction perpendicular to the curved surface, thereby increasing reliability in machining a workpiece.

In general, since the focal length of the optical lens is determined by the curvature of the lens surface, the shorter the focal length of the optical lens, the closer the shape of the optical lens to the sphere. In order to process such an optical lens, roughing is performed under a state in which a workpiece having a predetermined size is prepared and prepared, and then the grinding is completed to smooth the surface of the roughing finished material.

The above-described apparatus for polishing an optical lens has a structure in which a workpiece is worn by rotating and left and right or moving back and forth while injecting a polishing liquid while contacting a concave and convex spherical workpiece with a tool. It has a hinge structure in the vertical direction of the tool.

However, the above-described polishing apparatus has a problem in that the working pressure is changed because the contact angle at the outside of the tool and the center of the tool is different from each other. Therefore, the amount of processing is changed due to the characteristics of the polishing process. There was a problem to be separated from the processed crop.

The present invention has been made to solve the above-mentioned conventional problems, an object of the present invention is a clamping portion having a base portion, an index driver to which the workpiece is fixed at the top of the base portion, the polishing is disposed facing the clamping portion Equipped with an angle adjuster and a polishing angle adjuster mounted on the polishing angle adjuster and having a swing arm capable of height adjustment and pressure adjustment, the rotational trajectory of the tool is coincided with the center of rotation of the tool toward the center of curvature of the workpiece. It is to provide a polishing factory value that can be moved along the curved surface of the workpiece, the tool can always maintain a constant processing pressure in all areas of the curved surface in a direction perpendicular to the curved surface to increase the reliability in the machining of the workpiece.

In order to achieve the object of the present invention as described above, the present invention,

A workpiece transfer part having a base plate, a fixed plate fixedly disposed on one side of an upper surface of the base plate, and a transfer plate disposed on the fixed plate to be transportable along the fixed plate;

Work clamping with a conventional index driver having a fixed block fixed on the upper surface of the transfer plate, a rotary table disposed on the fixed block and the workpiece to be processed is rotated, and a table driving motor for rotating the rotary table. part;

Tilt angle adjusting part having a base facing each other from the other side of the upper side of the base plate, a rotating shaft rotatably disposed between the bases, and an adjusting frame having a lower portion mounted on the rotating shaft and pivoting and having a vertical receiving groove in the center portion thereof. ;

Swing arm driving motor disposed on the lower surface of the receiving groove, swing arm rotating shaft is connected to the swing arm driving motor and the upper portion is rotatably mounted on the upper surface of the receiving groove, the swing arm rotating shaft And a polishing control unit having a height adjusting block which is conveyed up and down along the swing arm rotation axis and rotated in the forward and reverse directions; And

A disk-shaped grinding tool, the other end of which is pivotally mounted up and down on one lower side of the height adjustment block and one end thereof extends toward the rotary table, and a workpiece mounted on one end of the swing arm facing the workpiece placed on the upper side of the rotary table. The rod and the other end are mounted up and down on one side of the height adjusting block, and the cylinder rod extending from one end is mounted on the upper part of the swing arm to pressurize the swing arm during polishing to transfer the processing pressure to the polishing tool stand. It provides a polishing factory consisting of a polishing portion having.

As described above, according to the present invention, a clamping portion having a base portion, an index driver to which the workpiece is fixed on the base portion, a polishing angle adjusting portion disposed to face the clamping portion, and mounted on the polishing angle adjusting portion In addition, by having an abrasive processing part having a swing arm capable of height adjustment and pressure adjustment, by matching the center of rotation of the tool toward the center of curvature of the workpiece, the rotational trajectory of the tool is moved along the curved surface of the workpiece, It is possible to maintain a constant machining pressure in all areas of the curved surface in a direction perpendicular to the curved surface at all times, thereby increasing the reliability of the workpiece.

Hereinafter, with reference to the accompanying drawings will be described a polishing apparatus according to an embodiment of the present invention.

1 is a front perspective view showing a polishing temporary factory according to the present invention, and Figure 2 is a rear perspective view showing a polishing temporary factory shown in FIG.

1 to 2, the abrasive processing apparatus 100 according to the present invention is a workpiece transfer unit 110, the workpiece clamping unit 130, the tilt angle control unit 140, the polishing control unit 160 and the polishing unit And 180.

First, the workpiece transfer part 110 is disposed on the base plate 112 and the fixed plate 114 and the fixed plate 114 which are fixed to the central portion of one side of the upper surface of the base plate 112 are horizontally formed The transfer plate 122 is disposed to be transportable along the fixed plate 114. At this time, guide rails 116a and 116b are formed at both sides of the upper surface of the fixing plate 114, and a screw shaft 118 is disposed between the guide rails 116a and 116b. The screw shaft 118 is rotatably disposed on the fixed plate 114, one end of which extends to the outside of the fixed plate 114 and an extension of the screw shaft 118 that extends to the outside of the fixed plate 114. The first rotation knob 120 is mounted to the portion. Meanwhile, guide blocks 124a and 124b corresponding to the guide rails 116a and 116b are formed on both lower sides of the transfer plate 122, and the guide blocks 124a and 124b are mounted to the screw shaft 118 between the guide blocks 124a and 124b. Block 126 is mounted. That is, when the screw shaft 118 is rotated, the transfer plate 122 is transmitted to the rotational force of the screw shaft 118 to the transfer block 126 side is transferred from the top of the fixed plate 114. The workpiece clamping unit 130 is disposed above the workpiece transfer unit 110 formed as described above.

Work clamping unit 130 is a fixed block 132 is fixed on the upper surface of the transfer plate 122, the rotary table 134 is disposed on the top of the fixed block 132, the workpiece to be processed is settled and rotated; It is provided with a conventional index driver 138 having a table driving motor 136 is disposed on one side of the fixed block 132 and mechanically connected to the rotary table 134 to rotate the rotary table 134. As such, the inclination angle adjusting unit 140 is disposed at the other side of the upper surface of the base plate 112 on which the workpiece transfer unit 110 and the workpiece clamping unit 130 are disposed.

The inclination angle adjusting unit 140 is disposed on both sides of the other side of the upper surface of the base plate 112 so as to be rotatable between the bases 142a and 142b facing the workpiece transfer unit 110 and the bases 142a and 142b. The rotating shaft 144 is disposed, and the control frame 156 is mounted on the rotating shaft 144 and pivoted. At this time, both ends of the rotating shaft 144 is pivotally mounted to the rotating blocks 146a and 146b disposed on the upper surfaces of the bases 142a and 142b, respectively. The first gear 148 is formed at one end of the rotary shaft 144 mounted on the rotary blocks 146a and 146b, and the first gear 148 is rotated on one side of the first gear 148. The second gear 150 is engaged with each other, and the second gear 150 is equipped with a second rotation knob 152 for rotating the second gear 150. Preferably, the first gear 148 and the second gear 150 meshing with each other are limited to the inside of the predetermined gearbox 154. On the other hand, the adjustment frame 156 is formed vertically and fixedly mounted on the rotating shaft 144 exposed between the base (142a, 142b). The center portion of the control frame 156 is formed with a vertical receiving groove 158 extending from the lower adjacent position of the control frame 156 to the upper adjacent position. The tilt angle adjusting unit 140 formed as described above is equipped with the polishing adjusting unit 160 and the polishing unit 180.

The polishing control unit 160 is swing arm driving motor 162 fixedly disposed on the lower surface of the receiving groove 158, the lower portion is connected to the swing arm driving motor 162, the upper portion of the upper portion of the receiving groove 158 Swing arm rotary shaft 164 rotatably mounted on the surface, and the height adjustment block 168 is rotated in the energetic direction along the swing arm rotary shaft 164 while being moved up and down along the swing arm rotary shaft 164. . The swing arm rotation shaft 164 is mounted to receive the rotational force of the swing arm driving motor 162 to perform forward and reverse movement. That is, the swing arm drive motor 162 adopts a normal and reverse motor capable of normal and reverse rotation. At this time, a normal rack gear 166 is formed on the radial rear surface of the swing arm rotation shaft 164 vertically from the lower side to the upper side of the swing arm rotation shaft 164. Height adjustment block 168 is mounted while wrapping a portion of the swing arm rotation shaft (164). The other side of the height adjustment block 168 formed as described above is built with a conventional pinion gear 170 that rotates in engagement with the rack gear 166, the pinion gear 170 is a pinion gear 170 The third rotating knob 172 to rotate is mounted to be exposed to one side of the height adjustment block 168. On the other hand, the first hinge piece (174a, 174b) and the second hinge piece (176a, 176b) protruding from both sides of the lower side and the upper side of the height adjustment block 168.

The polishing unit 180 may include a swing arm 182 pivotably mounted on one side of the height adjusting block 168, an abrasive tool stand 188 mounted at one end of the swing arm 182, and a swing arm. A pneumatic cylinder 194 for applying pressure to the 182 is provided. The other end of the swing arm 182 is disposed between the first hinge pieces (174a, 174b) formed on one side of the height adjustment block 168 is rotatably fixed by the first hinge (h1) while one end of the rotary table It is formed to have a predetermined length and extend to the (134) side. A coupling hole 184 is formed on one end surface of the swing arm 182 so that the polishing tool stand 188 may be coupled thereto, and a third hinge piece 186a may be formed on both sides of the upper surface of the swing arm 182 adjacent to one end thereof. 186b) is formed to protrude. The grinding tool stand 188 includes a horizontal bar 190a inserted horizontally into the coupling hole 184, and a vertical bar 190b bent downwardly vertically from an extension of the horizontal bar 190a and vertical bars ( At the lower portion of 190b), a disk-shaped grinding tool 192 is mounted to face the rotary table 134. At this time, the lower portion of the grinding tool 192 is curved concave or convex. On the other hand, the pneumatic cylinder 194, like the swing arm 182, the other end is fixed to the second hinge pieces (176a, 176b) by the second hinge (h2) to be rotated up and down, one end of the pneumatic cylinder (194) The cylinder rod 196 extending from the upper surface of the swing arm 182 extends and is pivotally fixed to the third hinge pieces 186a and 186b by the third hinge h3. This pneumatic cylinder 194 allows the processing pressure to be transmitted to the swing arm 182 when the grinding tool 192 processes the workpiece.

Hereinafter, the state of use of the polishing apparatus 100 formed as described above will be briefly described.

First, the workpiece to be processed into a desired shape is placed on the upper surface of the rotary table 134, and then the first rotary knob 120 is rotated to transfer the transfer plate 122 to an appropriate position. When the first rotary knob 120 is rotated in this manner, the first rotary knob 120 rotates the screw shaft 118 on which the transfer block 126 is mounted. As a result, the conveying plate 122 on which the workpiece clamping unit 130 is mounted is conveyed along the guide rails 116a and 116b. When the workpiece is conveyed to a position suitable for processing as described above, the second rotation knob 152 is rotated to pivot the adjustment frame 156 on which the polishing control unit 160 and the polishing unit 180 are mounted to the rotating table 134. Let's do it. That is, when the second rotary knob 152 is rotated, the second gear 150 connected to the second rotary knob 152 is rotated, and the first gear 148 engaged with the second gear 150 is rotated. The rotary shaft 144 rotates according to the rotation of the first gear 148 to pivot the control frame 156.

When the adjusting frame 156 pivots toward the rotary table 134 where the workpiece is placed, the third rotary knob 172 is rotated again to closely adhere the abrasive tool 192 of the abrasive tool stand 188 to the surface of the workpiece. Let's do it. At this time, when the third rotation knob 172 is rotated, the pinion gear 170 connected to the third rotation knob 172 is rotated and transferred along the engaged rack gear 166. When the grinding tool 192 of the grinding tool stand 188 is in close contact with the surface of the workpiece, power is applied to the table driving motor 136 to rotate the rotary table 134 on which the workpiece is placed. When the rotary table 134 rotates while the workpiece is in close contact with the abrasive tool 192, the polishing operation is performed on the surface of the workpiece. On the other hand, when power is applied to the swing arm driving motor 162, the swing arm driving motor 162 rotates the swing arm rotating shaft 164 in the forward and reverse directions, and the swing arm rotating shaft 164 rotates in the forward and reverse directions, thereby polishing the tool. When the swing arm 182 mounted with the stand 188 is rotated in the forward and reverse directions, the workpiece and the grinding tool 192 are always perpendicular to perform the grinding process. In addition, since the pneumatic cylinder 194 of the workpiece constantly provides pressure to the swing arm 182 side, a constant pressure is transmitted to the entire working surface of the workpiece.

The polishing apparatus 100 according to the present invention can adjust the position of the rotary table 134 and the height of the swing arm 182 according to the size and curvature of the workpiece placed on the rotary table 134 so that the same pressure is always the workpiece. It can be perpendicular to the surface and remain constant.

On the other hand, the curvature modification can be processed by controlling the time that the polishing tool 192 of the polishing tool stand 188 stays radially on the workpiece. The following equation shows the amount of processing by polishing per unit time.

Where k wear is the polishing constant, p is the processing pressure, and v is the relative velocity. Therefore, curvature correction is possible by controlling the machining time staying on the workpiece according to the radial position. In this way, it is possible to machine by removing the deviation from the aspherical shape machining cavity approximation spherical surface in which the radius of curvature is continuously changed by polishing.

Where c = 1 / R (curvature of the approximate sphere), k is an aspheric constant, and Ai is a higher order aspheric coefficient. According to the aspherical surface constant k, it is divided into parabola (k = -1), ellipsoid (k> 0), ellipsoid (-1 <k <0), hyperbolic (k <-1), and spherical surface (k = 0).

As described above, the abrasive processing apparatus 100 according to the present invention is a workpiece transfer unit 110, the workpiece clamping unit 130, the tilt angle control unit 140, the polishing control unit 160 and the polishing unit 180 By matching the center of rotation of the tool toward the center of curvature of the workpiece, the trajectory of the tool is moved along the surface of the workpiece, the tool is always in a direction perpendicular to the surface to maintain a constant machining pressure in all areas of the surface In addition, it is possible to maintain a high degree of reliability in the machining of the workpiece, as well as to process the aspherical shape in which the processing curvature correction and the curvature shape are continuously changed.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art can be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims You will understand.

1 is a front perspective view showing a polishing mill according to the present invention,

FIG. 2 is an enlarged perspective view of the tilt angle adjusting unit, the polishing adjusting unit, and the polishing unit shown in FIG. 1; and

Figure 3 is a rear perspective view showing the back of the polishing control unit shown in FIG.

Explanation of symbols on the main parts of the drawing

100: abrasive processing device 110: workpiece transfer part

112: base plate 114: fixed plate

116a, 116b: guide rail 118: screw shaft

120: first rotation handle 122: transfer plate

124a, 124b: guide block 126: transfer block

130: workpiece clamping unit 132: fixed block

134: rotary table 136: table driving motor

140: tilt angle control unit 142a, 142b: expectation

144: rotation axis 148: first gear

150: second gear 152: second rotation knob

156: adjusting frame 158: receiving groove

160: grinding control unit 162: swing arm drive motor

164: swing arm rotation shaft 166: rack gear

168: height adjustment block 170: pinion gear

172: third rotation knob 180: grinding unit

182: swing arm 188: grinding tool stand

192: grinding tool 194: pneumatic cylinder

Claims (9)

  1. A workpiece transfer part having a base plate, a fixed plate fixedly disposed on one side of the upper surface of the base plate, and a transfer plate disposed on the fixed plate to be transportable along the fixed plate;
    A conventional index driver having a fixed block fixed on the upper surface of the transfer plate, a rotary table which is disposed on the fixed block and the workpiece to be processed is rotated, and a table driving motor for rotating the rotary table. Work clamping unit having;
     An inclination with the base facing each other from the other side of the upper surface of the base plate, a rotating shaft rotatably disposed between the base, and an adjustment frame in which the lower portion is pivotally mounted on the rotating shaft and a vertical receiving groove is formed in the center portion; Angle control unit;
    A swing arm driving motor disposed on a lower surface of the receiving groove, a swing arm rotating shaft having a lower portion connected to the swing arm driving motor and an upper portion rotatably mounted on an upper surface of the receiving groove, and the swing arm rotating shaft It is mounted while wrapping the polishing control unit having a height adjusting block which is moved up and down along the swing arm rotation axis and rotated in the forward and reverse directions; And
    The other end is pivotally mounted up and down on one side lower portion of the height adjustment block and one end is extended to the rotary table side, and a disc mounted on one end of the swing arm facing the workpiece placed on the upper portion of the rotary table The grinding tool stand of the shape, and the other end is mounted up and down on one side of the height adjustment block and the cylinder rod extending from one end is mounted on the upper swing arm to press the swing arm during polishing processing to the polishing tool stand An abrasive processing apparatus comprising a polishing unit having a pneumatic cylinder for transmitting a processing pressure.
  2. According to claim 1, The guide rail is formed on both sides of the upper surface of the fixing plate, the screw shaft is fixedly disposed rotatably along the fixing plate between the guide rail and one end extends to the outside of the fixing plate And an extension part of the screw shaft is equipped with a first rotation knob for rotating the screw shaft.
  3. According to claim 1, The lower side of the conveying plate is formed with guide blocks corresponding to the guide rail, between the guide block is mounted on the screw shaft to transfer the rotational force of the screw shaft to convey the conveying plate Polishing processing apparatus, characterized in that the receiving transfer block is mounted.
  4. According to claim 1, wherein both ends of the rotary shaft is rotatably mounted to the rotary block disposed on each of the base upper surface, the first gear is formed at the end of any one of the rotary shaft mounted to the rotary block And a second gear for rotating the first gear is engaged with one side of the first gear, and the second gear is mounted with a second rotation knob for rotating the second gear. 2 gear is a polishing apparatus, characterized in that defined in the predetermined gearbox.
  5. According to claim 1, On the radial back of the swing arm rotation shaft is formed a normal rack gear vertically from the lower portion of the swing arm rotation axis to the upper side, and the other side of the height adjustment block is rotated in engagement with the rack gear inside The pinion gear of the built-in, the pinion gear is a grinding device, characterized in that the third rotation knob for rotating the pinion gear is mounted to be exposed to one side of the height adjustment block.
  6. The first hinge piece protrudes from the lower side of one side of the height adjusting block so that the other end of the swing arm can be pivotally mounted up and down by a first hinge, and the one side of the height adjusting block. Similarly, on both sides of the upper side, a second hinge piece protrudes so that the other end of the pneumatic cylinder can be rotatably mounted up and down by a second lining.
  7. According to claim 1, wherein the coupling hole is formed on one end surface of the swing arm so that the polishing tool can be mounted, and the cylinder rod extending from the pneumatic cylinder on both sides of the upper surface adjacent to one end of the swing arm is a third hinge And a third hinge piece protrudingly formed so as to be pivotably mounted by the polishing apparatus.
  8. 8. The polishing tool as set forth in claim 7, wherein the grinding tool bench includes a horizontal bar inserted horizontally into the coupling hole, a vertical bar bent vertically downward from an extension of the horizontal bar, and an abrasive tool mounted below the vertical bar. Polishing apparatus, characterized in that provided.
  9. The polishing apparatus according to claim 1 or 8, wherein the lower portion of the polishing tool has any one of a concave shape or a convex shape.
KR10-2004-0024975A 2004-04-12 2004-04-12 Lapping, Polishing machine KR100536041B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR10-2004-0024975A KR100536041B1 (en) 2004-04-12 2004-04-12 Lapping, Polishing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR10-2004-0024975A KR100536041B1 (en) 2004-04-12 2004-04-12 Lapping, Polishing machine

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KR20050099781A KR20050099781A (en) 2005-10-17
KR100536041B1 true KR100536041B1 (en) 2005-12-14

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Application Number Title Priority Date Filing Date
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KR102052595B1 (en) * 2018-09-28 2019-12-05 (주)지원테크 Grinding apparatus for welding part of metal housing

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CN105965369B (en) * 2016-07-04 2019-06-25 东莞市中研机械设备有限公司 A kind of four-head plane lapping polishing machine of band driving
CN106181654B (en) * 2016-08-31 2018-06-01 常州市昊益机械科技有限公司 A kind of automobile mirrors edging device
CN109048549A (en) * 2017-01-05 2018-12-21 丽水市飞天人机械设计有限公司 A kind of rotary polishing apparatus
CN106737104B (en) * 2017-01-20 2019-02-26 东莞市域标五金制品有限公司 A kind of machining burnishing device
CN106625099B (en) * 2017-02-07 2018-10-26 安徽永昌金属制品有限公司 Wheel hub burr Self-adjusting sander
KR102001727B1 (en) * 2017-10-31 2019-07-17 (주)디알밸브 A grinder for grinding surface of a sphere
CN108723954A (en) * 2018-03-26 2018-11-02 湖州弘盛消防设备有限公司 A kind of fire-fighting equipment parts production multi-angle polished device
CN108747701A (en) * 2018-05-31 2018-11-06 安徽扬子职业技术学院 A kind of automatic polishing equipment of turnover vehicle vehicle body
CN108942552A (en) * 2018-07-23 2018-12-07 芜湖金光汽车配件有限责任公司 A kind of automotive plastic parts polissoir
CN109571180A (en) * 2018-12-31 2019-04-05 张馨文 A kind of multi-angle plate grinding device
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KR102052595B1 (en) * 2018-09-28 2019-12-05 (주)지원테크 Grinding apparatus for welding part of metal housing

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